JPS58155391A - Method of inspecting load state of fuel assembly - Google Patents
Method of inspecting load state of fuel assemblyInfo
- Publication number
- JPS58155391A JPS58155391A JP57038285A JP3828582A JPS58155391A JP S58155391 A JPS58155391 A JP S58155391A JP 57038285 A JP57038285 A JP 57038285A JP 3828582 A JP3828582 A JP 3828582A JP S58155391 A JPS58155391 A JP S58155391A
- Authority
- JP
- Japan
- Prior art keywords
- fuel assembly
- channel
- core
- arrangement
- fuel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は沸騰水形原子炉の燃料集合体の装荷状態を検査
する方法に関する。TECHNICAL FIELD OF THE INVENTION The present invention relates to a method for inspecting the loading condition of a fuel assembly for a boiling water nuclear reactor.
沸騰水形原子炉は断面十字形の制御棒の周囲に４体の燃
料集合体を配置して単位格子を構成し、さらにこの単位
格子を多数格子状に配列して炉心を構成している。そし
て、制御棒は単位格子内の４体の燃料集合体間に形成さ
れる断面十字形の間隙内に挿入される。したがって燃料
集合体が正しく装荷されていないとこの燃料集合体と制
御棒との干渉が生じた如、を先制脚棒が正しく案内され
ない可能性がある。この丸め、従来は全燃料集合体を装
荷し九のち、作業フロアから双眼鏡等を用いて炉心の上
面を詳細に観察し、全燃料集合体が正しく装荷されてい
るか否かを検査してい友。In a boiling water reactor, four fuel assemblies are arranged around a control rod having a cross-shaped cross section to form a unit cell, and a large number of these unit cells are arranged in a lattice form to form a reactor core. The control rods are then inserted into gaps having a cruciform cross section formed between the four fuel assemblies within the unit cell. Therefore, if the fuel assembly is not loaded correctly, there is a possibility that the preemptive landing gear rod will not be guided correctly due to interference between the fuel assembly and the control rod. Conventionally, all fuel assemblies were loaded, and then the upper surface of the core was observed in detail using binoculars from the work floor to check whether all fuel assemblies were loaded correctly.
従来の検査は目視による検査である丸め、検査に長時間
を要し、また検査精度の向上に限界があった。Conventional inspections require a long time for rounding and inspection, which is a visual inspection, and there are limits to the improvement of inspection accuracy.
本発明は燃料集合体の装荷状態を能率的かつ高精度に検
査する仁とができる燃料集会体の装荷状態検査方法を得
ることにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a method for inspecting the loading condition of a fuel assembly, which allows efficient and highly accurate inspection of the loading condition of a fuel assembly.
本発明は炉心の真上からこの炉心上面をテレビカメラで
撮影する過程と、炉心に装荷され九燃料集合体のチャン
ネルファスナの像の配列ノ４ターンを上記テレビカメラ
で撮影され九炉心上面の画儂から求め、この配列ノ９タ
ーンを燃料集合体が正しく装荷されている場合のチャン
ネル７アスナの配列・中ターンと比較する過程とを具備
したものである。そして、チャンネル７アスナは通常イ
ンコネルやステンレス鋼の機械加工品であるから、表面
の光反射率が高い、したがって炉心の上面を真上から撮
影するとチャンネルファスナの上面の儂だけが高輝度で
表れる。The present invention involves the process of photographing the top surface of the core with a television camera from directly above the core, and the process of photographing the top surface of the nine cores by photographing four turns of the array of images of the channel fasteners of the nine fuel assemblies loaded in the core with the television camera. This method includes a process of determining the nine turns of this arrangement from me and comparing it with the arrangement and middle turns of the channel 7 assembler when the fuel assembly is correctly loaded. Since channel 7 fasteners are usually machined parts of Inconel or stainless steel, the surface has a high light reflectance. Therefore, when photographing the top of the core from directly above, only the top surface of the channel fastener appears with high brightness.
したがってこのチャンネルファスナの配列すなわち、燃
料集合体の配列が明瞭Ｋｌ？ｊ！認でき、この配列の・
母ターンを正常な場合の配列パターンと比較する仁とＫ
よ如燃料集合体が正常に装荷されているか否かを確実に
検査できるものである。Therefore, the arrangement of this channel fastener, that is, the arrangement of the fuel assembly is clearly Kl? j! of this array.
Jin and K compare the mother turn with the normal sequence pattern.
This makes it possible to reliably check whether the fuel assembly is properly loaded.
図を参照して本発明の一実施例を説明する。 An embodiment of the present invention will be described with reference to the drawings.
まず、沸騰水形原子炉における炉心の構成を説明する０
図中１は燃料集合体である。この燃料ハンドル３を断面
略正方形のチャンネル？ツクス４内に収容したものであ
る。そして、上記の燃料棒２・・・の上端は上部タイグ
レー）ＪＫ支持され、また下端部は下部タイプレートσ
に支持され、所定の配列に保持され老いる。なお、上部
タイグレート５はアル建エクム勢０鋳造成形品である。First, we will explain the core configuration of a boiling water reactor.
In the figure, 1 is a fuel assembly. Is this fuel handle 3 a roughly square channel in cross section? It is housed in Tux 4. The upper end of the fuel rod 2 above is supported by the upper tie plate (JK), and the lower end is supported by the lower tie plate σ
It is supported by the system and maintained in a predetermined arrangement as it ages. Incidentally, the upper tie plate 5 is a cast molded product made of aluminum alloy.
そして、上記チャンネルがψジス４の上端部の角部には
チャンネル７アスナ１が設けられている。こ０チヤンネ
ル７アスｔ１はチャンネルＩ、クス４の外面に沿って設
けられた弾性を有する一対の７７スナ部ＦａｓＦｍを有
し、チャンネル＆、クス４の上端角部に＊付けられた三
角形の上板＃に＊付がルト＃によって取付けられている
。なお、このチャンネル７アスナ１および職付−ルト９
等はイン；ネルあるいはステンレス鋼勢の耐食性の＃料
で廖威され、また機械加工によって成形され、そ０表面
は平滑に形成されている。なお、１ｏはハンドルである
。A channel 7 assembler 1 is provided at the corner of the upper end of the channel φ screw 4. This 0 channel 7 ast t1 has a pair of elastic 77 snap parts FasFm provided along the outer surface of the channel I and the box 4, and has a triangular upper part attached to the upper corner of the channel &, the box 4. The plate # marked with * is attached by the root #. In addition, this Channel 7 Asuna 1 and Shutsuke Ruto 9
The parts are coated with a corrosion-resistant material such as aluminum or stainless steel, and are formed by machining, so that their surfaces are smooth. Note that 1o is a handle.
を九、１１は制御棒であゐ、この制御棒１１は４枚のブ
レード部１２−・を有し、断面十字形をなしている。そ
して、ブレード部１ｚ・・・内にはＢ４Ｃ等の中性子吸
収材を充填し九−イズンチ為−ブ１１・・・が収容され
ている。なお、１４Ｆｉこの制御棒１１０下降速度を制
限するス♂−トリ電、夕、１５はハンドルである。9, 11 is a control rod, and this control rod 11 has four blade portions 12--, and has a cross-shaped cross section. The inside of the blade portion 1z is filled with a neutron absorbing material such as B4C, and the blade portion 11 is housed therein. Note that 14 Fi is a steering wheel that limits the descending speed of the control rod 110, and 15 is a handle.
そして、第３図に示す如く前記の燃料集合体１・・・は
制御棒１１一本のＩＩＩＩＫ ４体装荷されて単位格子
１６・・・を構成し、この単位格子１ｃｍ・がさらに多
数格子状に配列され、炉心１１を構成してい石、そして
、各単位格子１６・・・内においては、第５図に示す如
く燃料集合体１・・・はそのチャンネルファスナ１−・
・が中心に位置するように装荷され、各チャンネル７ア
スナト・・は互に当接してこれら燃料集合体１・・・間
に制御棒１１・・・を挿入するに必ｌ！な間隙を確保す
るように構成されている０次にこのような構成の炉心７
７において、燃料集合体１・・・の装荷状態を検査する
本発明の一実施例の方法について説明する。第４図中の
１１はテレビカメラであって、原子炉ウェルｌ＃の上方
に設けられえ貴行タレーン２０に取付けられ、炉心１ｒ
の真上に位置し、真上から炉心１ｒの上面を真上から操
影するように構成されてい為、なお、１１−・はｊｌｌ
ＩｌｌＩ用の光源である。そして、このテレビカメラ１
８で撮影された炉心１１０上面ｏｉｉ＊はＣ凰テ等に受
像品ｘＨｃ表示され、壕九必ＩＩＫ応じて映倫記録装置
（図示せず）Ｋ記鍮されるように構成されている。As shown in Fig. 3, the fuel assembly 1... is loaded with four IIIKs each including one control rod 11 to form a unit lattice 16..., and this unit lattice 1cm is further formed into a lattice shape. As shown in FIG.
It is necessary to insert the control rods 11 between the fuel assemblies 1 so that each channel 7 assunat is in contact with each other. The zero-order core 7 is configured to ensure a gap such as
7, a method according to an embodiment of the present invention for inspecting the loading state of the fuel assemblies 1 will be explained. Reference numeral 11 in FIG. 4 is a television camera, which is installed above the reactor well l# and attached to the turret 20 of the reactor core 1r.
Since it is located directly above the reactor core 1r and is configured to manipulate the top surface of the reactor core 1r from directly above, 11-.
This is a light source for IllI. And this TV camera 1
The upper surface of the reactor core 110 taken in 8 is displayed on the C-screen, etc., and is recorded on the Eirin recording device (not shown) according to the depth of the trench.
ところで、上記の燃料集合体１・・・の上部タイグレー
トはアル建ニウム畔の鋳造品であ）、表面が粗面である
とともに表面部層等によ）表面の光反射率が低い、これ
に対しチャンネルファスナ７・・・やその取付Ｉルトリ
・・・はインッネル中ステンレス鋼の機械加工品であ〉
、光Ｏ［耐重が為い、よって炉心１１の上面を真上から
撮参するとこのチャンネル７アスナｒ−や取付−ルト９
・・・の上面の反射光が直接テレビカメラ１１に入射す
るので、このチャンネル７アスナｒ・・・中堆付ダルト
ｔの上面の像にけが輝度がきわめて高くなる。したがっ
て、真上から炉心ＪＦＯ上面を撮影しえ像の中にはチャ
ンネルファスナｒ・−に対応して輝［０高い像が示され
、よってこれらチャンネル７アスナト・・の配列が明瞭
に視認できる。そして、受像器２２上０像に表れ九チャ
ンネルツァスナｒ−の配置パターンを全燃料集合体１・
・・が正常Ｋ１１ｌｉ荷され九場合の・譬ターンと比較
すれば、第６図あるいは第７図の如く燃料集合体１・・
・の装荷方法が間違っている場合、ありいは燃料集合体
１−・がずれていゐ状態等をこのチャンネル７アスナト
・・の配列）ぐターンから容易に検出することができる
。By the way, the upper tie plate of the above-mentioned fuel assembly 1 is a cast product made of aluminum, has a rough surface, and has a low light reflectance due to surface layers, etc. On the other hand, the channel fastener 7 and its mounting hole are machined products made of stainless steel.
, light O
Since the reflected light from the upper surface directly enters the television camera 11, the brightness of the image on the upper surface of the Channel 7 Asuna r... medium-deposited Dalt t becomes extremely high. Therefore, when the upper surface of the core JFO is photographed from directly above, an image with high brightness corresponding to channel fasteners r.- is shown, and therefore the arrangement of these channel fasteners r. Then, the arrangement pattern of the 9-channel Tsasner r-, which appears in the 0 image on the image receptor 22, is shown in the entire fuel assembly 1.
.. is normally loaded with K11li and compared with the example of 9 cases, the fuel assembly 1.. is as shown in Fig. 6 or 7.
If the loading method is incorrect, or if the fuel assembly 1-. is misaligned, it can be easily detected from the arrangement of the channel 7 ass nuts.
なお、チャ／ネルツァスナｒ−中取付Ｉルト９・・・の
上面をより一層明瞭に表すにはこれらの上面をパフ加工
等で鏡面仕上をしておけばよい。Incidentally, in order to more clearly represent the upper surfaces of the channel/nerzasna r-middle installation I-rut 9..., these upper surfaces may be given a mirror finish by puffing or the like.
本発明は炉心の真上からこの炉心上面をテレビカメラで
撮影する過１と、炉心に装荷され九燃料集合体のチャン
ネル７アスナの儂の配列ノ４ターンを上記テレビカメラ
で撮影されえ炉心上面のｉｉｉ儂から求め、この配列パ
ターンを燃料集合体が正しく装荷されている場会Ｏチャ
ンネルファスナの配列／皆ターンと比較す為過薯とを真
備し丸ものである。そして、チャンネル７アスナは通常
インコネルやステンレス鋼Ｏ機械加工品であるから、表
面の光反射率が高い、し九がって炉心の上面を真上から
操影するとチャンネル７アスナの上面の像だけが高輝度
で表れる。The present invention involves photographing the upper surface of the core with a television camera from directly above the core, and photographing the four turns of my arrangement of channel 7 assemblies of nine fuel assemblies loaded in the core with the television camera. iii) and compare this arrangement pattern with the arrangement/full turn of the O-channel fastener when the fuel assembly is correctly loaded. Since channel 7 asuna is usually machined from Inconel or stainless steel, its surface has a high light reflectance. Therefore, if you view the top of the core from directly above, you will only see an image of the top of channel 7 asuna. appears with high brightness.
したがってこのチャンネル７アスナＯ配列すなわち燃料
集合体の配列が明瞭に視認で１、こＯ配列の・臂ターフ
を正常愈場合の配列ツヤターンと比較することＫより燃
料集合体が正常に装荷されているか否かを効率的かつ確
実に検査で亀る等その効果は大である。Therefore, this channel 7 Asuna O arrangement, that is, the arrangement of the fuel assembly, can be clearly seen. 1. Compare the arm turf of this O arrangement with the arrangement luster turn in the case of normal firing. From K, check whether the fuel assembly is loaded normally. The effects are great, such as being able to efficiently and reliably check whether or not the product is present.
図は本発明の詳細な説明するもＯ″ｅあって、第１図は
燃料集金体Ｏ斜視図、第２ｗＡは制御棒の斜視図、第３
図は燃料集合体および制御棒Ｏ配置を示す炉心の−ＩＩ
Ｏ平面図、第４１ａは本発明の一実施例の方法をＩ！明
する概略的な儒函閣、第６図は正常な装荷状態Ｏ単位格
子内Ｏチャンネルファスナーの配置を示す平面図、第６
図および第７図は間違う九偵荷状態におけ為同平面図で
ある。
１・・・燃料集合体、２−燃料棒、５−上部タイグレー
ト、！・・・チャンネル７アスナ ｔ−＠付がルト、１
１・・・制御棒、１６・・・単位格子、１ｒ・・・炉心
、１１・・・テレビカメラ、２２−・受ａＳ。
出願人代理人 弁理士 鈴 江 武 彦第５図
／１６
第６図
、１６
／
第７図The drawings provide a detailed explanation of the present invention. Figure 1 is a perspective view of the fuel collector O, Figure 2 is a perspective view of the control rod, and Figure 3 is a perspective view of the control rod.
The figure shows the core arrangement of fuel assemblies and control rods -II
O plan view, No. 41a shows the method of one embodiment of the present invention. Figure 6 is a plan view showing the arrangement of O channel fasteners in a unit cell in a normal loading state.
FIG. 7 and FIG. 7 are the same plan views in the wrong loading state. 1...Fuel assembly, 2-Fuel rod, 5-Upper tie plate,! ...Channel 7 Asuna t-@ is Ruto, 1
DESCRIPTION OF SYMBOLS 1...Control rod, 16...Unit cell, 1r...Reactor core, 11...TV camera, 22--Receiving aS. Applicant's representative Patent attorney Takehiko Suzue Figure 5/16 Figure 6, 16/Figure 7
Claims (1)
過程と、炉心に装荷された燃料集合体のチャンネルファ
スナの儂の配列ノ々ターンを上記テレビカメラで撮影さ
れた炉心上面の画儂から求め、この配列ノ臂ターンを燃
料集合体が正しく装荷されている場合のチャンネルファ
スナの配列ノリ−ンと比較する過程とを具備したことを
特徴とする燃料集合体の装荷状態検査方法。The process of photographing the upper surface of the core with a television camera from directly above the core, and the arrangement and turns of the channel fasteners of the fuel assemblies loaded in the core were determined from the image of the upper surface of the core taken with the television camera. A method for inspecting the loading state of a fuel assembly, comprising the steps of: comparing the arm turn of the arrangement with the arrangement nolin of channel fasteners when the fuel assembly is correctly loaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57038285A JPS58155391A (en) | 1982-03-11 | 1982-03-11 | Method of inspecting load state of fuel assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57038285A JPS58155391A (en) | 1982-03-11 | 1982-03-11 | Method of inspecting load state of fuel assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58155391A true JPS58155391A (en) | 1983-09-16 |
Family
ID=12521030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57038285A Pending JPS58155391A (en) | 1982-03-11 | 1982-03-11 | Method of inspecting load state of fuel assembly |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58155391A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005351659A (en) * | 2004-06-08 | 2005-12-22 | Hitachi Ltd | Fuel monitoring device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5341679U (en) * | 1976-09-14 | 1978-04-11 |
-
1982
- 1982-03-11 JP JP57038285A patent/JPS58155391A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5341679U (en) * | 1976-09-14 | 1978-04-11 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005351659A (en) * | 2004-06-08 | 2005-12-22 | Hitachi Ltd | Fuel monitoring device |
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